Up-and-coming senator Nick Rast's young son is terminally ill with leukemia. A mysterious faith healer, Gregory Wolfe, appears and seems to cure the boy. Rast's wife Sandy falls in love with Wolfe, but the powerful interests behind Rast's career, represented by geriatric monster Doc Wheelan are less happy with events.
Unfortunately the movie Harlequin is not yet available on HBO Max.
| Directing | Simon Wincer | Director |
| Editing | Adrian Carr | Editor |
| Production | William Fayman | Executive Producer |
| Production | Antony I. Ginnane | Producer |
| Camera | Gary Hansen | Director of Photography |
| Directing | Caroline Stanton | Continuity |
| Sound | Brian May | Original Music Composer |
| Production | Jane Scott | Associate Producer |
| Crew | Jon George | Additional Dialogue |
| Art | Virginia Bieneman | Draughtsman |
| Art | Noel Butler | Construction Grip |
| Art | Steve Courtley | Construction Manager |
| Crew | Neill D. Hicks | Additional Dialogue |
| Costume & Make-Up | Cheryl Williams | Hairdresser |
| Directing | Michael McKeag | First Assistant Director |
| Directing | Jenny Miles | Third Assistant Director |
| Costume & Make-Up | Terry Ryan | Costume Designer |
| Writing | Everett De Roche | Screenplay |
| Costume & Make-Up | Lois Hohenfels | Makeup Artist |
| Production | Bernard Hides | Production Designer |
| Directing | Grant Harris | Second Assistant Director |
| Editing | Margaret Cardin | Negative Cutter |
| Sound | Brian May | Conductor |
| Writing | Russell Hagg | Script Editor |
| Crew | Ross Skiffington | Creative Consultant |
| Sound | Steve Lambeth | Assistant Sound Editor |
| Camera | Nicholas Clark | Still Photographer |
| Editing | Arthur Cambridge | Colorist |
| Crew | Peter West | Stunt Coordinator |
| Art | Clark Munro | Props |
| Sound | Terry Rodman | ADR & Dubbing |
| Lighting | Mick Morris | Gaffer |
| Production | Lynn Barker | Production Accountant |
| Production | Lynette Thorburn | Publicist |
| Sound | Gary Wilkins | Sound Recordist |
| Camera | Jeremy Robbins | Clapper Loader |
| Art | Michael Langton | Construction Grip |
| Crew | Conrad Rothmann | Special Effects |
| Production | Daro Gunzburg | Production Assistant |
| Art | Owen Paterson | Assistant Art Director |
| Art | Wayne Smith | Construction Grip |
| Sound | Steve Lambeth | ADR & Dubbing |
| Lighting | Reg Garside | Best Boy Electric |
| Camera | Jan Kenny | Focus Puller |
| Crew | William Fayman | Presenter |
| Camera | Peter Moss | Camera Operator |
| Sound | Russell Naughton | Assistant Music Supervisor |
| Production | Jennifer Barty | Production Secretary |
| Art | Peter Sands | Construction Grip |
| Sound | Peter Fenton | Sound Mixer |
| Visual Effects | Roger Cowland | Visual Effects |
| Crew | Willie Kay | Creative Consultant |
| Art | Michael Dore | Construction Grip |
| Crew | Chris Murray | Special Effects Assistant |
| Sound | Roger Savage | Recording Supervision |
| Production | Sylvia Van Wyk | Producer's Assistant |
| Sound | Mark J. Wasiutak | Boom Operator |
| Camera | Ross Erickson | Key Grip |
| Camera | Robin Morgan | Grip |
| Costume & Make-Up | Vicki Rowland | Wardrobe Assistant |
